Question

Everybody belives that indonesia will become a great country someday and .... a. i am too b.i will too c.so am i d.i do too

Answer 1

B. i will too.

kalimat di atas disebut eliptical setences yg memiliki rumusan berbentuk positif, dg rumus: subject (everybody believes that indonesia) + WILL (aux verb) + object, AND + subject + aux verb + too.
atau: subject (everybody believes that indonesia) + WILL (aux verb) + object, AND + so+ aux verb + subject.